AT&T doubling peak wireless data speed in Chicago -- chicagotribune.com

Wireless operator AT&T said Wednesday it is rolling out higher-speed networks in Chicago and five other cities by year-end, effectively doubling speeds for iPhone 3GS users.

The new technology is called High Speed Packet Access 7.2, or HSPA, and allows a theoretical peak download speed of 7.2 megabits per second, compared with the current network's 3.6 megabits per second. Speeds will be slower in practice and vary according to factors such as location and device...